Spongecraftian Highway System

The Spongecraftian Highway System, also called the Interstate Highways, are a system of elevated roads and tunnels stretching through the major towns, cities and settlements of Spongecraftia. Players use the highway by spawning a car or bike and driving down it.

The launch of SpongeCraft Forge in January 2026 brought a new, more advanced system of vehicles to the server using the Immersive Vehicles mod. The new cars introduced with the mod were quickly found to be incompatible with the steep on-ramps and sharp corners of the highway network, leading to cars frequently flying off of the roads and causing damage due to the increased speeds. leading to the start of a major redesign of the entire system. This rebuild, beginning at the Squidville end of Highway 2, involves heavy use of blocks and decorative elements from City Craft, and aims to modernize elements of the highways, including softened curves, lower-grade entry ramps, and the implementation of interstate-style exits and interchanges.

List of Highways

• Highway 1 (yellow) - Grand Spongecraftia Directory to Historic Spongecraftia (Tentacle Acres, HSC City)
• Highway 2 (light gray) - Historic Spongecraftia to Squidville (USC)
• Highway 3 (red) - Grand Spongecraftia Directory to Japanese Spongecraftia (passes through Arctic Spongecraftia)
• Highway 4 (blue) - Squidville to Barnacle Bay (exits in Lumillard)
• Highway 5 (brown) - Salty Seas to the Llama Kingdoms (exits in Hunterville and International Village)
• Highway 6 (pink) - Grand Spongecraftia Directory to Sabanna
• Highway 7 (lime) - Andean Spongecraftia to Penumbria (HSC) (exits in Raspberry City, Ukulele Bottom, Goldinia and Kelp City)
• Highway 8 (purple) - Ukulele Bottom to Tentacle Acres (exits in Diamond Town, Outlandia and Bikini Bottom) (passes through Outland Spongecraftia)
• Highway 9 (cyan) - Arctic Spongecraftia to Black Rock (exits in Tech City)
• Highway 10 (magenta) - Japanese Spongecraftia to Squidville (exits in Horizonia)
• Highway 11 (white) - Spongecraftia Suburbs to Goldinia (exits in Moon City and sblopolis)
• Highway 12 (green) - Penumbria to Grand Spongecraftia Station (Old Directory)
• Highway 13 (gray) - Barnacle Bay to Shell City

Rest Stops

OWM, sbl, crushingmayhem, and ZaidCatDog all showed interest and ideas in making various rest stops throughout the highway system. OWM is planning to make "Outpost" rest stops featuring Outland Petroleum from Outland Spongecraftia. sbl is planning to make rest stops featuring his new convenience store chain, Twotone. They will include a Twotone, a gas bar, and a car wash.

Historical Facts

Highway 5 did connect from Andean Spongecraftia to Outer Spongecraftia, but after a lawsuit served from the Trans Spongecraftian Highway, this part of the highway was removed. The entrance can still be found immediately after the second turn starting out from Andean Spongecraftia.

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  The closure